55020401 has 8 divisors (see below), whose sum is σ = 56695464. Its totient is φ = 53361280.

The previous prime is 55020379. The next prime is 55020403. The reversal of 55020401 is 10402055.

It can be written as a sum of positive squares in 4 ways, for example, as 13868176 + 41152225 = 3724^2 + 6415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55020401 - 2¹⁸ = 54758257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55020401.

It is not an unprimeable number, because it can be changed into a prime (55020403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3215 + ... + 10971.

It is an arithmetic number, because the mean of its divisors is an integer number (7086933).

Almost surely, 2^55020401 is an apocalyptic number.

It is an amenable number.

55020401 is a deficient number, since it is larger than the sum of its proper divisors (1675063).

55020401 is a wasteful number, since it uses less digits than its factorization.

55020401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7971.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 55020401 is about 7417.5737947121. The cubic root of 55020401 is about 380.3422608897.

Adding to 55020401 its reverse (10402055), we get a palindrome (65422456).

The spelling of 55020401 in words is "fifty-five million, twenty thousand, four hundred one".